cc: Move CalculateContentsScale from LayerImpl to LayerTreeHostCommon

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 7668becc132ddf2dc3ac0db94a2f448d31f3284c..940732f193c2c3bd450f648aead6d25696be6e6d 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -1041,21 +1041,6 @@ void LayerImpl::SetContentsScale(float contents_scale_x,
   NoteLayerPropertyChanged();
 }
 
-void LayerImpl::CalculateContentsScale(float ideal_contents_scale,
-                                       float device_scale_factor,
-                                       float page_scale_factor,
-                                       float maximum_animation_contents_scale,
-                                       bool animating_transform_to_screen,
-                                       float* contents_scale_x,
-                                       float* contents_scale_y,
-                                       gfx::Size* content_bounds) {
-  // Base LayerImpl has all of its content scales and content bounds pushed
-  // from its Layer during commit and just reuses those values as-is.
-  *contents_scale_x = this->contents_scale_x();
-  *contents_scale_y = this->contents_scale_y();
-  *content_bounds = this->content_bounds();
-}
-
 void LayerImpl::SetScrollOffsetDelegate(
     ScrollOffsetDelegate* scroll_offset_delegate) {
   // Having both a scroll parent and a scroll offset delegate is unsupported.